Microcrystalline thin metal oxide films for optoelectronic applications

Alexander Malik, Ana Sêco, Elvira Fortunato, Rodrigo Martins

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


We report the properties and optoelectronic applications of transparent and conductive indium and tin oxide films prepared by the spray pyrolysis method and doped with Sn or F, respectively. The film properties have been measured using X-ray diffraction, optical and electrical absorption. As examples of applications we produced a set of selective optical detectors for different spectral regions, covering the wavelength range from 0.25 to 1.1 μm, based on metal oxide-semiconductor heterostructures and using different substrates such as: GaP, GaSe, AlxGa1-xAs, GaAs and Si. The fabricated devices exhibit several features such as: production simplicity, high quantum efficiency, uniform sensitivity over the entire active area and a high response speed. Finally, we present a high quantum efficiency and solar blind monocrystalline zinc sulphide optical sensor fabricated by spray deposition as an alternative to the ultraviolet-enhanced SiC and GaN photodetectors and the performances of a solar cell.

Original languageEnglish
Pages (from-to)1092-1095
Number of pages4
JournalJournal of Non-Crystalline Solids
Issue numberPART 2
Publication statusPublished - May 1998


  • Indium
  • Metal oxide films
  • Optoelectronic applications
  • Tin


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